package com.atguigu.gulimall.auth.controller;

import com.alibaba.fastjson.TypeReference;
import com.atguigu.common.constant.AuthServiceConstant;
import com.atguigu.common.exception.BizCodeEnum;
import com.atguigu.common.utils.R;
import com.atguigu.common.vo.MemberRespVo;
import com.atguigu.gulimall.auth.feign.MemberFeignService;
import com.atguigu.gulimall.auth.feign.ThirdPartFeignService;
import com.atguigu.gulimall.auth.vo.UserLoginVo;
import com.atguigu.gulimall.auth.vo.UserRegistVo;
import com.netflix.ribbon.proxy.annotation.Http;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.util.StringUtils;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.servlet.http.HttpSession;
import javax.validation.Valid;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

/**
 * @author Yanglinfengkk
 * 发送一个请求直接跳转到一个页面
 * SpringMvc    viewcontroller  将请求和页面映射过来
 * 登录操作 Controller
 */
@Controller
public class LoginController {

    @Autowired
    ThirdPartFeignService thirdPartFeignService;

    @Autowired
    StringRedisTemplate redisTemplate;

    @Autowired
    MemberFeignService memberFeignService;

    /**
     * 发送短信验证码供第三方服务调用
     *
     * @return
     */
    @ResponseBody
    @GetMapping("/sms/sendCode")
    public R sendCode(@RequestParam("phone") String phone) {
        //TODO 1.接口防刷

        String redisCode = redisTemplate.opsForValue().get(AuthServiceConstant.SMS_CODE_CACHE_PREFIX + phone);
        if (!StringUtils.isEmpty(redisCode)) {
            long aLong = Long.parseLong(redisCode.split("_")[1]);
            if (System.currentTimeMillis() - aLong < 60000) {
                //60秒内不能再发送请求验证码
                return R.error(BizCodeEnum.VALUE_SMS_CODE_EXCEPTION.getCode(), BizCodeEnum.VALUE_SMS_CODE_EXCEPTION.getMsg());
            }
        }

        //2.验证码的再次校验,redis  存:key-phone value-code
        String code = UUID.randomUUID().toString().substring(0, 5);
        String substring = code + "_" + System.currentTimeMillis();
        /**
         * key->sms:code:手机号->验证码
         * void set(K var1, V var2, long var3, TimeUnit var5);
         * redis缓存验证码,防止同一个phone在60秒内再次发送验证码
         */
        redisTemplate.opsForValue().set(AuthServiceConstant.SMS_CODE_CACHE_PREFIX + phone, substring,
                10, TimeUnit.MINUTES);

        thirdPartFeignService.sendCode(phone, code);
        return R.ok();
    }

    /**
     * return "redirect:http://auth.gulimall.com/login.html";  不同服务跳转需带上全路径
     * RedirectAttributes      模拟重定向视图携带上数据
     * //TODO 重定向携带数据,利用session原理,将数据放在session中,
     * 只要调到下一个页面取出这个数据之后,session里面的数据就会删除
     * //TODO  1.分布式下的session问题
     *
     * @return
     */
    @PostMapping("/regIst")
    public String regIst(@Valid UserRegistVo vo, BindingResult result,
                         RedirectAttributes redirectAttributes) {
        if (result.hasErrors()) {
            Map<String, String> errors = result.getFieldErrors().stream()
                    .collect(Collectors.toMap(FieldError::getField, FieldError::getDefaultMessage));
            redirectAttributes.addFlashAttribute("errors", errors);
            /**
             * Request method 'POST' not supported
             * 用户注册->/regIst[POST]--->转发/reg.html(路径映射默认都是Get方式访问的)
             */
            //校验错误,重定向到注册页映射地址  Controller
            return "redirect:http://auth.gulimall.com/reg.html";
        }

        //1.校验验证码
        String code = vo.getCode();
        String s = redisTemplate.opsForValue().get(AuthServiceConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
        if (!StringUtils.isEmpty(s)) {
            if (code.equals(s.split("_")[0])) {
                //删除验证码,令牌机制
                redisTemplate.delete(AuthServiceConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
                //验证码通过    真正注册,调用远程服务进行注册
                R r = memberFeignService.regIst(vo);
                if (r.getCode() == 0) {
                    //注册成功回到首页/回到登录页    /以项目的域名路径为准
                    return "redirect:http://auth.gulimall.com/login.html";
                } else {
                    Map<String, String> errors = new HashMap<>();
                    errors.put("msg", r.getData("msg",new TypeReference<String>() {}));
                    redirectAttributes.addFlashAttribute("errors", errors);
                    return "redirect:http://auth.gulimall.com/reg.html";
                }
            } else {
                Map<String, String> errors = new HashMap<>();
                errors.put("code", "验证码错误");
                redirectAttributes.addFlashAttribute("errors", errors);
                //校验错误,重定向到注册页映射地址  Controller
                return "redirect:http://auth.gulimall.com/reg.html";
            }
        } else {
            Map<String, String> errors = new HashMap<String, String>();
            errors.put("code", "验证码错误");
            redirectAttributes.addFlashAttribute("errors", errors);
            //校验错误,重定向到注册页映射地址  Controller
            return "redirect:http://auth.gulimall.com/reg.html";
        }

    }

    /**
     * 基本登录操作
     * @param vo
     * @return
     */
    @PostMapping("/login")
    public String login(UserLoginVo vo, RedirectAttributes redirectAttributes, HttpSession session){

        //远程登录
        R login = memberFeignService.login(vo);
        if(login.getCode()==0){
            //成功
            //提取返回的用户信息进行相关操作
            MemberRespVo data = login.getData("data", new TypeReference<MemberRespVo>() {
            });
            //成功放到Session中
            session.setAttribute(AuthServiceConstant.LOGIN_USER,data);
            return "redirect:http://gulimall.com";
        }else{
            Map<String,String> errors=new HashMap<>();
            errors.put("msg",login.getData("msg",new TypeReference<String>(){}));
            redirectAttributes.addFlashAttribute("errors",errors);
            return "redirect:http://auth.gulimall.com/login.html";
        }

    }

    /**
     * 登录页跳转逻辑
     * @param session
     * @return
     */
    @GetMapping("/login.html")
    public String loginPage(HttpSession session){
        Object attribute = session.getAttribute(AuthServiceConstant.LOGIN_USER);
        if (attribute==null) {
            //登录页
            return "login";
        }else{
            return "redirect:http://gulimall.com";
        }

    }
}
